problems with iodbc-support of php

i've got problems with iodbc-support of php. i'm using php 3.0.16 and libiodbc 2.50.3. after configuring php with --with-iodbc=/usr/local (home path of iodbc) and starting apache, i've got the message: server:/root # /usr/local/httpd/bin/apachectl start Syntax error on line 207 of /usr/local/httpd/conf/httpd.conf: Cannot load /usr/local/httpd/libexec/libphp3.so into server: File not found /usr/local/httpd/bin/apachectl start: httpd could not be started (ok, file libphp3.so is in place!) configuring php without iodbc-support runs fine. i suggest the file could not be loaded because the module itself loads a file of iodbc, witch could not be found. but what? any ideas? thx malte